i've an ext3 partition at /dev/hda7 -> /mnt/data mounting rw at boottime.
a few days ago this fs started to become read-only without any cause. a "mount /dev/hda7 -o rw,remount" doesnt fix the problem - no user nor root can write to this fs ( touch testfile ).
unmounting and remounting fixes it..
i ran a e2fsck which reported a few errors - but theyre now ok.
copying a large amount of data around the disk ( cp /mnt/data/dir1/* /mnt/data/dir2/. ) also produces a ro fs.

well ... got no real idea thou ... but maybe you try a diffrent fs like reiserfs or xfs ... i use reiserfs on about 80 machines for over two years now without any problems at all ..._________________A mathematician is a machine for turning coffee into theorems. ~ Alfred Renyi (*1921 - †1970)

Can you check your logs to see whether you have ide error messages? It sounds like your disk may be acting up since you report fs errors with things like copy.

user124 wrote:

i've an ext3 partition at /dev/hda7 -> /mnt/data mounting rw at boottime.
a few days ago this fs started to become read-only without any cause. a "mount /dev/hda7 -o rw,remount" doesnt fix the problem - no user nor root can write to this fs ( touch testfile ).
unmounting and remounting fixes it..
i ran a e2fsck which reported a few errors - but theyre now ok.
copying a large amount of data around the disk ( cp /mnt/data/dir1/* /mnt/data/dir2/. ) also produces a ro fs.